Air-pump.



1.1. MESSERLI.

`AIR PUMP,

APPLICATION FILED AUG.21| |913.

1 114:0 ,699 Patented May 25, 1915.

@9H/wwwa 7HE MORRIS PETERS cov. PHOTD-LITHU., WASHINGTON, DA c.

, UNITED STATE-s 4EEALTENTY, oEErcE.

JOHN J'. MESSERLI, 0F KINGSVILLE, TEXAS, ASSIGNOR OF ONE-HALF TOFREDERICK H. EICKHOFF, OF KINGSVILLE, TEXAS.

AIR-PUMP.

Y Specification of Letters IPatent. I' Patented May 25, 1915.

Application led August 21, 191.3. Serial No. 786,023.

To all whom t may concern f Be it known that I, JOHN J. MEssERLI, acitizen of the United States, residing at Kingsville, in the county ofNueces and State of Texas, have invented certain new and usefulImprovements in Air-Pumps;

and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. 1 l

My invention relates to improvements in air pumpsvand especially thatclass adapted for the iniation of pneumatic tires or for other purposes.

An important object of my invention is to provide a pump of the abovementioned character which in operation is capable of compressing at eachstroke of the piston or plunger a quantity of air or other fluid of avolume greater than that whichis ordinarily compressed at each stroke ofpumps of the usual construction.

A further important object of my invention resides in the provision of aplunger or piston novelly arranged and constructed to provide thedesired action.

A still further object of my invention is to provide a device of theabove mentionedcharacter which is comparatively simple and inexpensivein its construction and therefore more commercially desirable than pumps`at present on the market.

The above and additionaly objects are accomplished by such means as areillustrated inthe accompanying drawings, described in the followingspecification and then more particularly pointed out in the claims whichare appended hereto and form part of this application.

With reference to the drawings, wherein, I have illustrated thepreferred embodiment of my invention as it is reduced to practice, andthroughout the several views of which, similar reference numeralsdesignate corresponding parts: Figure 1 is a vertical sectional viewillustrating my device in assembled operative position, Fig. 2 is asectional View taken online 2-2 of Fig. 1 illustrating the transversepin extending through the lower portion of the pump cylinder andemployed for pivotally mounting the foot rest, and Fig. 3 is a detailview of the foot rest.

Referring now to the drawing the numeral 1 designates the pump cylinderwhich is formed of any suitable length and diameter and is threaded atits lower terminaly porting the foot rest 5 which may be folded in anout of the way position as indicated by the dotted lines in Fig. 1. Thepin 8 also extends lthrough the lower terminal Aof the pump cylinder 1as will be clearly seen with reference to Fig. 2, whereby the cylinderis locked in engagement with the base cap 2. A flanged cap 6 is threadedupon the upper terminal of the pump cylinder 1 and is provided with anair admission port 7 formed therein and communicating with the interiorof the pump cylinder 1. A piston or plunger designated 8 as an entiretyis mounted within the pump cylinder 1 and is threaded upon the lowerterminal of a piston rod 9 which extends upwardly through the flangedcap 6 andisprovided upon its upper terminal with a suitable handle 10 tobe gripped by the operator for the purpose of operating the pump. f

An air outlet port 11 is formed through the base cap 2 and lowerterminal of the pump casing 1 and is adapted to have connected therewitha suitable hose or ipe, not shown, to supply the air to the artic e tobe inflated. y

The piston or plunger 8 in which my invention resides mainly, consistsof a flanged tubular portion 12 threaded at its upper terminal to thelower terminal of the piston rod 9 which is provided with an air passage13 communicating with the interior of the tubular portion 12 at itslower terminal and with the interior of the pump cylinder at its upperterminal through the opening 14: formed in the upper terminal of thetubular portion 12. An annular metallic washer plate 15 is mounted uponthe tubular portion 12 and engages the under face of the flange 16formed on the tubular portion. A cupshaped packing washer 17 is alsomounted upon the tubular portion 12 and engages the adjacent face of thewasher plate 15 and as a means for retaining the washer 17 in itscup-shaped position this invention employs a cup shaped ring 19 which ismounted upon the tubular portion 12, engages the washer 17 and is heldin position by means of a nut 20 which is threaded upon the lowerterminal of the tubular portion 12.

A plug 21 is threaded interiorly of the lower terminal of the tubularmember 1 2 and disposed at'its upper terminal in spaced rela-tion to thelower terminal of the (piston rod 9 thereby affording a valve operatingchamber 22. The plug 21 is provided long itildinallv with .the airpassage andis groovedv transversely as at A2l at its upper terminal toprovide for the escapement of the air to the lower part of the pumpcasing, when the ball valve is seated ,upon and closes thev air passage23 asn will lbe clearly seen with reference to Fig. 1 inv which the ball25 is illustrated in the position above described. The 'ball 25 isnormally in engagement with the upper terminal of the air passage r23and will seat upon the valve iseat 26 provided by the lower terminalofthe air passage 13 in the piston rod 9 when the plunger is moved onits downward stroke, in ai'manner which will be hereinafter more fullydescribed.

In operatiomassuming the plunger to Abe in a position as illustrated 'inF ig. y1, it is moved upwardly and air which will have entered the. pumpCasing through the non*7 et 'the tcp thereof will passthrough ytheVopening 111, vport 1-3, into the chamber -22 vabout the ballV 25through the" groove 24C into ,passage 23 from thenceto the'pumpcylinder. Upon the downward stroke of the plunger 4the air which is 'inthe pump cylinder 1 below the piston or lunger 8 will be compressed, andthe Vball 5 forced in enga,f ementu with the valve seat 26 wherebythe"`ai.'r will be confined tothe lower portion` of the pump casing 1 asit is prevented escapement throughV the passage 13. When the piston orplunger 8 is moved downwardly the air will escape from the pump cylinderl through theeX- haust port 1 1. `It will thus be seen that I haveprovided a pump which is arranged and constructed to accomplish thefunctions hereinbefore described and will owing to itsv proportion andarrangement of parts mayy be resorted to, when required, without sacri-{icing any of -tlie'a'dvfantages of my inventionias defined in theappended claims.

Having thus described my invention, what is claimed is i i V 1, lIn anair pump,zthe combination with a pump cylinder, of a detachable capforming a closure for the lower end of said cylinder, Ya pin rotatablyjournaled in said icap and having eyelets formed upon its ends, a

foot lrest slid'ably supported by Ysaid eyeletsfory movementtransverselyv to or parallel with said cylinder. Y Y

2. lInanair pump, the combination with a pump cylinder, of a detachablecap forming a 'closure for thelwer end of said cylinder, a pin rotatablyjournaled vin said -cap and having eyelets formed upon its ends, a footrest slidably supported by saidl eyelets .for movement transversely -;toor parallel with said cylinder,ksaid cylinder'being provided withtransverse openings near the base thereof, saidv piny extending throughsaid openingsfor locking lsaid cap against rotation upon said cylinders.

In testimony whereof l affxmy signature in presence of two witnesses. yI i .'IQHN Jf 14.113551313111- :Witnesses:

R, RBUoTToM, HOUSE.

Copies of this Ipatent may7 be obtained. .for vecents each, Onyyaddressin-g .the E VCennuissinne1'- y of rIafcents, i Washington,D..G.. f 1

